2031564 has 24 divisors (see below), whose sum is σ = 4802560. Its totient is φ = 668304.

The previous prime is 2031563. The next prime is 2031569. The reversal of 2031564 is 4651302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031564.

It is not an unprimeable number, because it can be changed into a prime (2031563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 2019.

2^2031564 is an apocalyptic number.

It is an amenable number.

2031564 is an abundant number, since it is smaller than the sum of its proper divisors (2770996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2031564 is a wasteful number, since it uses less digits than its factorization.

2031564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229 (or 2227 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2031564 is about 1425.3294356043. The cubic root of 2031564 is about 126.6514509270.

Adding to 2031564 its reverse (4651302), we get a palindrome (6682866).

The spelling of 2031564 in words is "two million, thirty-one thousand, five hundred sixty-four".